1. CloudBridge and Storage Solutions
The killer app
Gopinath Durairaj
Director, Product Management, Citrix Cloud Networking Group
Cedric Courteix
Technical Alliance Manager, NetApp Global Alliances

2. Citrix + NetApp joint solutions

3. © 2013 Citrix | Confidential – Do Not Distribute
Data Center
Data Center
(Backup)
Storage Replication
• Synchronous Replication  limited by latency
• Asynchronous Replication  Periodic updates
• NetApp SnapMirror
• Uses multiple connections
• Up to two per volume
• Full volume or incremental replicates
• Typical Replication Options
• Nightly – finish within the assigned window
• Continuous – co-exist with critical flows
Storage

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Replication Performance over WAN
Latency
• TCP sender transmits data upto the
window size and waits for Ack
• Round-trip time impacts utilization even
if bandwidth is plenty
Packet Loss
• TCP dramatically reduces the window
size when packets get lost
• Slow ramp up back to the original
window size
Standard TCP Behavior

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CloudBridge Optimization Technologies
TCP Flow
Control
Compression
Protocol
Accelerators
QoS
AutoOptimizer™ Engine
Application
Mix
Network
Conditions
Improve
inefficient
protocols
Data
compression /
De-duplication
Overcome
loss/latency
penalties
Prioritize
critical
traffic
  

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TCP Flow Control
Slow Start Slow Ramp
Without CloudBridge
Average
Utilization
Throughput
Time
With CloudBridge
Average
Utilization
Throughput
Time
Link Speed
Tight RPO  Less data loss with failures
Adjusts for both latency and packet loss

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QoS
NetApp SnapMirror
Bulk Transfers
WAN
Application Traffic
Without CloudBridge
60%
20%
20%
Bulk Transfers
Application Traffic
NetApp SnapMirror
With Cloudbridge
Application level granularity
Deep classification, prioritization and shaping
Run SnapMirror in shared links

8. © 2013 Citrix | Confidential – Do Not Distribute
CloudBridge with SnapMirror
Issue SnapMirror SnapMirror + CloudBridge
Low WAN utilization –
due to latency, packet loss
Increase window size to address
latency
Optimized window size +
congestion behavior to
increase WAN utilization
Limited WAN throughput Native compression Offload compression to
CloudBridge  increased file
serving capacity
Shared link with other
critical traffic
N/A Preferential treatment for
high priority traffic and
bandwidth allocation.
Enable link sharing, running
SnapMirror in background

9. Test Results

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NetApp SnapMirror Testing
NetApp SnapMirror Async
CloudBridge 5000 CloudBridge 5000
NetApp Storage NetApp Storage
Database Server Database Server
DC1 DC2
FAS 3270 FAS 3270

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SnapMirror Replication times
Greater benefits under high latency or lossy WAN conditions
Using 50ms RTT WAN latency and 0.01% loss
Results depend on WAN condition and data compressibility
119
578
52 59
0
100
200
300
400
500
600
700
0% Loss 0.01% Loss
Replicationtime,Seconds
Baseline Optimized
1180
376
95
37
0
200
400
600
800
1000
1200
1400
No de-dup De-dup
Replicationtime,Seconds
Baseline Optimized

12. © 2013 Citrix | Confidential – Do Not Distribute
References
Citrix Sales Knowledge Base
Joint Citrix and NetApp White paper
http://www.citrix.com/skb/articles/RDY9621
Deployment Guide
http://www.citrix.com/skb/articles/RDY9506
NetApp Technical Report
SnapMirror Async Overview and Best Practices Guide
www.netapp.com/us/library/technical-reports/tr-3446.html

13. Work better. Live better.Work better. Live better.